Title: #3964: travis: remove CI integration
Removing Travis CI in favour of Azure Pipelines.
All tests previously tested by Travis are also configured in Azure.
Repos  and  were used to build Docker images for Travis, thus
they are no longer required for branches master and ipa-4-8.
Branches ipa-4-7 and ipa-4-6 don't have Azure pipelines configured,
so Travis will continue to be used by them.
1 - https://github.com/freeipa/ipa-docker-test-runner
2 - https://github.com/freeipa/freeipa-builder
Signed-off-by: Armando Neto <abiagion(a)redhat.com>
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/3964/head:pr3964
git checkout pr3964